Typewriting machine



Feb. 25, l930.- Q s. B. HALL 1 4 TYPEWRITING MACHINE I Filed Nov. 28. 1927 INVENTOR Patented Feb. 25,1930

. hereinafter appear; my invention consistsin COMPANY, QEILIOLLQNEW $1033, A CORPORATION OF uEwYoRK TYPEWBITING A HI NE invention relates "to":typewriting ma;

chines and more particularlyito so-called dust -gua'r'd means which will prevent parof the type b'a-r segment 'from entering the pivothearings of working partsof themachin'eio Y n The object of mydn'vention, generally p 'a-keylever 3pivotjed ateto: a sub-lever or state'd,"i's to provide" simple, inexpensive and highly elfective'means' of the character speci- I fied whichfmay be readily incorporated ino "existing machines without modifying,- or materiallymodifyin the existing:- structural feature's'thereof; v e V Tot-he above and other ends which "will the features of construction, arrangements of parts andicombinationsof-devlces set forth in tl1e'gfollow-in'gspecification and particular,

ly'poi nt'e'din the appended claims. H I-iiithe accompanying drawings; whereincorrespondin 1 reference: characters designat'e} corresponding parts: in the: 'clifierent views, e V Fig. '1 is a' det'ailyventical fore and aft,

' r cent'ral sectlona'lwiew showing: a-portion of a 1 "typ'ewr-itin-g'machine equipped with the dust guard: of my invention; .7 V v I FigLj Z is an enlarged, detail,-fragmentary,- top plan View showing oneiend portioir-of the type has segment-rand dust. guard and some ettheiassociated parts; f

v Fig 3 is a top plan View ofthe lolank' from which the dust guard is formed and.

' 4t isa: detail; fragmentary, perspective View; as seen from the-ream o't11etypebar "segment, thedust guard, and some of the "associated parts;

The. invention-1s shown in the present in? seal-iceembodied'in a No. 12 Remington machinel in: whiclr'said: invention may be. readily included vvszit-hout modiiying; 01, materially modifying, the structural features of" said machines 'asstheynovw exist. Only so; mu'ehof said? machine: is shown as is; necessary to ar rive at an understanding ofmyfinventioiiiin it's-embodimentthereinii Itshould beunderstood; however, that; the; invention i not re stnietezL tmembodiment; the

' upwardly-1 and rearwardly swinging; type-- -bars whlch impact jagainstthe front fia ce the front of the. platen torwardi S UE i3. HALL, or 12300313156; YORK ASsZIGNOKT Z EMIN TQNQT P WRITQR ferred to,- butimay be used various styles ayaila'ble. r 1

Inthe drawings, 1 represents the platen of typewriting machines, wherever" found-1 carried by the carriage (not-shown): to'trawel' from side to side' of the machine over the usual top plate 2'ofthe-machine Each type action of the machine comprises actuatingrmember fl Each sub lever is piv totally. supported on a-pivot wire 6Ia11'ol work's in a" guide. slot? of a casting .orsuppor't 8 which extends acrossthe machine; and is s'earm of each sub-lever 5: carries aL headed pi-n which is diagrammatically illustr-atedandis e l0which Works-in a slotl l' in the. heel been;

associated type bar-1'2 Thesetypei hairs are theheel of a typebar works andi's guided; The-rear side of the segment l4khasga-segmentally disposed channel 16; located above .gontrolyofthe cams'18'o'n the heels- 0f the:type V Extending inward from; each side of the 'central'op'ening in the-topplateisa support.-

in'g member or'lug 1,9 and to; which the type bar segment issecured by screws-20; The

of 115116 p te f r guided by, center guide 121 seeured by "screws to, thei f-roat' facegof the segment. f a x p 1 e The; COIlSlZLllQtlOIIy as thus. far d s rib d;

constitutes part of-the. No,- l2yRelningtpnlm'a e mounted to turn'on api vot-wire1'3 car riedby v: 1 an upright! type bar segment 1% proyi ded w1th rachal guide slots 15 in each 0% which chine, and-lliwil-lvnow: describe thezfeaturesof my invent-ion which are'combi neditherei-e The; pivot bearings oi-thgL typaqbaf si'andi the- SU b lQVQIS are protected; inthe; usual c011- Sbru'etion against the adniis'SiOri; oit

particlesoi grit ,5 etc that may" e ment; 11 this.

7 slots of the type bar segment. Therefore,

the present invention is directed more par t-icularly to means for preventing particles that drop from the platen to the rear of the segment from entering, not only the pivot bearings for the type bars, but the pivot bearings of the sub-levers as well, which latter feature has proved to be an important factor.

The dust guard 23 is formed from a strip of resilient metal or half hard spring stock;

and a blank from which the dust guard is formed is shown in Fig. 3. It will be seen that about midway in the length of thisstrip there is provided in the rear edge thereof a cutout or aperture 24 to receive a part of an actuating member (not shown) for the" ribbon vibraton i Each end of the strip has its edge beveled or cut off at an angle to the adjacent dotted line a, as represented at 25. These lines a represent the lines where the end portions of the strip are bent off atan angle to the main body portion thereof to provide bladelike supporting cars 26. Each lug 19 on the top plate has its inner side out through from front to rear to provide a bearing slot 27 (see Fig. 1) iii which one ofthe supporting cars 26 is received and seated. Each of these slots, as Viewed in Fig. 1, is preferably inclined slightly to the horizontalysay to the extent of from two to five degrees, depending somewhat on conditions and the character of the stock employed. In the present illustration such inclination is shown as about five degrees mainly for the purposeof clearly illustrating this feature. Otherwise stated the plane of each slot 27 is slightly less than a right angle to the plane of the type bar segment when the latter issecured in place,

'lhe effect ofsupporting the dust guard in this manner at the ends thereof is to maintain the forward contact edge of the dust guard, especially at the lower central portion thereof, snug against the rear side of the segment.

It will be understood that there is, by this.

arrangement. a straining of they ears in the slots 27 which tends to force the lower bowed central portion of the dust guard forward against the rear side ofthe segment, and that this same straining of the ears in the slots tends to create a binding action of the ears against the walls of the slots-tohold the dust guard against'accidental displacement therefron'i. Before the segment has been mount-ed in place the dust guard is bentby,

hand against the inherent force of its spring toa curved" COIldltlOIh' and while it is thus held. the guardus introduced 1n place from the front of the machine with the ears in the bearingslots.= The ears are forced rearward- 1y a part of the distance theyare finally to assume in the 'slots with the lower end por- 'be employed Without others rwithout departtend to strain the lower portion of the guard rearward and also displace the ears 26 to their home'position in the slots so that the. entire front edge of the dust guard will lie snug against the rear side of the segment,

as shown in Fig. 1; the strainlng'of'the -metal, however, tending to malntaln the lower -middle portion against the segment with the greatest assurance. From an inspection of Fig. 2 it will be understood that the bottom wall 28 of each slot 27 is inclined inward from front to rear to match the inclination of the end 25 of ear 26'to be received therein. The extent of the inclination of each Wall 28 and each end 25, is exaggerated in the drawings for the purpose ofclearly illustrating this feature flowever, the extent of such inclination'may vary under different conditions. It will be understood that the-reaction of the spring of the dust guard will tend to-seat'each inclined end 25 against the correspondingly inclinedwall 28 of the slot'27 in which it is received, and that such c'oacting inclined surfaces and said force will tend to cam thedust guard forward and resist its rearward displacement andthus keep the front edge of the dust guard in close contact with the rear side of the segment.

It will be seen that the dust guard extends rearward fromthe segment a sufiicient dis tance to cover the rearwardly projecting portion of the universal bar, the heels of all of the type bars, the connections between all of the sub-levers andtype bars and the pivot bearings of all of the sub-levers, which latter feature is highly important.

It will be understood from the foregoing that it is the reaction of the spring force of the dust guard which tends to holdthe lat-1 ter in the position in which the guard is placed; that the cramping action of the ears 26 in the slots 27 andthe cam surfaces 25 and 28 insure the maintenance of the forward edge of the dust guardoin contact with the rear side of the segment and prevent an ac cidental creeping of the dust guard from its effective position whenthe machine is in use.

The construction is such, nevertheless, that place or detached whendesired.

It will be seen, moreover, that theconstruction is inexpensive and may readily be embodied in the No. 12,'as .well 'as other models. of, Remington machines without modifying the structural features thereoffurther than to cut saw'kerfs in the lugs I9fto form the slots 27. various changes may bemade'in the con} struction, a'ndc'e'rtain features thereof may r, v ta-47'5" v ing'from my invention as it is defined-in the I by Letters Patent, is:

accompanying claims. p r

lVhat I CliLlHlfiSllBW and desire to secure 1. The'combination' of an I seg1nent,aser1es of type b'ars p1voted thereto, and a dust guard thatpro]ects rearward from the rear. faceofsaid segment above the pivotbearings of said type bars, said dust guard being formed from a'stri'pof spring met'al'that is sprung into place for use and held fast in effective position by its inherent r spring force.

' of the segment and that projects rearward" from the rear faceofsaid segment above the} 2. The combination of an upright type bar segment, a series of type bars pivoted thereto,-

and a dust, guard located wholly in the rear pivot bearings of saidtype bars and is retained in such positiondurin'g the operation of the type bars, said dust guard being formed from-a strip of metal with supporting ears provided at the ends thereof, and a support for said dust guard having slots in which said ears are removably'seated by a sliding action of the ears in saidslots.

3. The combination of an upright type bar segment, a series of type bars pivoted thereto,

a dust guard that projects rearward from the rear face of said segment above the p1vot bearings of said type bars, said dust guard being formed from a strip of spring metal with supporting ears provided at the ends thereof, and a support for said dust guard .having slots in which said ears are seated and held by the reaction of the spring force of saiddust guard.

40, v V the rear face of said'segment above the p vot 41:. The combination of an upright type bar segment, 'a series of type bars pivotedthereto, a dust guard that projects rearward from bearings of said type bars, said dust guard 45 clined edges, and a -support for' said'dust;

guard havingslots in which said ears areseated and heldby the reaction of the spring force of said dust guard, the bottom wall of being formed from a strip of spring metal with supporting'ears prov ded at the ends thereof, said ears having outer beveled or ineach of said slots being sloping to match the beveled edge of the ear that is received therein, said sloping walls and beveled edges on the earstending toipreven-tthe dust guard from rworking away from the rear'side of the kseg ientg p v I; I

' 5; The combination of an upright; type bar segment, a series of typebars pivoted there @to, adust guard that projects rearward fromthe'rear face of said segmentabove-the pivot" bearings of'saidtype bars, said dust guard being formed-from a strip of spring metal with supporting jears-provided at the ends thereof, and a supportfor said'dust guard having'slots in which said ears are remov ably seated, the 'planeof each of said slots upright type bar segmentseriesof t-yl beingsli'ghtly'less-than a right angle to the plan'ef tl'ie'segment, whereby when the ears i saidslot'sthe lower portion'o'f thedustguard will be forcedto bear snuglyagainstthe rear-'sideofthe segment and said ears ht again all receive a Shg' t the walls of said" slot b ding action an upright type bar are pivoted t-liei"ef'-' to, a dust-gnarcb; I ects rearwardfrom therear-faceof s'ald segment above the pivot bearings of said type bars, said dust guard he combi'na't ion ofbeing formed from a'strip of springmetal with supporting ears provided at the ends thereof, saidears having outer beveled or inj clined edges, and a support for said dust uard havin slots in which said ears are i 2) 23 seated and held by the reaction of the spring force of said dust guard, the bottom wall of each of saidslots being sloping to match the beveled edge of the ear that is received therein, said sloping walls and beveled edges on the ears tending to prevent the dust guard from working, away from the rear side of the segment, the plane of each of said slots being slightly less than a right angle to the plane of: the segment, whereby when the ears are seatfed insaid slots the lower portion of the dust guard will be forced to bear snugly against the rear sideof the segment and said ears will receive a slight binding action against the wallsof said slots. I g 7. The combination of an upright type bar segment, aseries of type bars pivoted thereto, a series of pivoted sub-levers, and a dust guard formed; from a strip of resilient metal adapted to be bent into a curved condition and retained seated on its support and in a curved condition by thereaction of the ;re-. silient strip, said dust guard extending from the rear face ofthe segment and overlying the heels'of the type'bars and protecting the pivot bearings of the type bars and the sub levers as well from rubbings or'falling particles which drop from the front face of the platen'to the rear of the segment.

8. "The combination of an uprlg pivoted below the heels of the type bars, a dust-guard formed from a strip of resilient v metal adapted to be bent into a curved condition and'having bent-0E securing or sup-'' porting blades, and a support'to which the segment is detachably secured and which is provided with slots'in which said securingp 7 httype bar segment, a series of type bars pivoted thereto, a series of-type bar actuating members 9. The combination of an upright type bar segment, a series of type bars pivoted thereto, and a dust guard formed from a strip of resilient metal adapted to be bent into a curyed condition and detaohably held in fixed position of use and in association with said segment by the inherent resiliency of said strip. v

Signed atthe city of New York, in the r 7 county of New York and State of New York,

this 26th day of November A. D. 1927.

SAMUEL B. 

